Debugger: Implement host interface roster listener.

TargetHostInterfaceRoster:
- Add Listener interface. For now, this simply notifies the listener of
  changes to the active debugger count.
- Adjust show new team window command to automatically fall back to the local
  interface window if one isn't specified. Fixes the Start New Team menu item
  in the TeamWindow. The latter will later be expanded to show the available
  interfaces to start a new team on in a submenu.

Debugger:
- Implement roster listener interface in order to know when to attempt
  application quit.

With this commit, all necessary work to isolate the application from the target
host is complete, and work on the actual remote interface and protocol can
begin.

src/apps/debugger/Debugger.cpp

@@ -208,7 +208,7 @@ parse_arguments(int argc, const char* const* argv, bool noOutput,
 }
 
 static status_t
-global_init()
+global_init(TargetHostInterfaceRoster::Listener* listener)
 {
 	status_t error = TypeHandlerRoster::CreateDefault();
 	if (error != B_OK)
@@ -222,7 +222,7 @@ global_init()
 	if (error != B_OK)
 		return error;
 
-	error = TargetHostInterfaceRoster::CreateDefault();
+	error = TargetHostInterfaceRoster::CreateDefault(listener);
 	if (error != B_OK)
 		return error;
 
@@ -242,7 +242,8 @@ global_init()
 // #pragma mark - Debugger application class
 
 
-class Debugger : public BApplication {
+class Debugger : public BApplication,
+	private TargetHostInterfaceRoster::Listener {
 public:
 								Debugger();
 								~Debugger();
@@ -256,6 +257,9 @@ private:
 	virtual bool 				QuitRequested();
 	virtual void 				Quit();
 
+	// TargetHostInterfaceRoster::Listener
+	virtual	void				TeamDebuggerCountChanged(int32 count);
+
 private:
 			status_t			_StartNewTeam(TargetHostInterface* interface,
 									const char* teamPath, const char* args);
@@ -270,7 +274,7 @@ private:
 // #pragma mark - CliDebugger
 
 
-class CliDebugger {
+class CliDebugger : private TargetHostInterfaceRoster::Listener {
 public:
 								CliDebugger();
 								~CliDebugger();
@@ -279,7 +283,7 @@ public:
 };
 
 
-class ReportDebugger {
+class ReportDebugger : private TargetHostInterfaceRoster::Listener  {
 public:
 								ReportDebugger();
 								~ReportDebugger();
@@ -293,6 +297,7 @@ public:
 Debugger::Debugger()
 	:
 	BApplication(kDebuggerSignature),
+	TargetHostInterfaceRoster::Listener(),
 	fTeamsWindow(NULL),
 	fStartTeamWindow(NULL)
 {
@@ -311,7 +316,7 @@ Debugger::~Debugger()
 status_t
 Debugger::Init()
 {
-	status_t error = global_init();
+	status_t error = global_init(this);
 	if (error != B_OK)
 		return error;
 
@@ -351,8 +356,12 @@ Debugger::MessageReceived(BMessage* message)
 			TargetHostInterface* hostInterface;
 			if (message->FindPointer("interface",
 					reinterpret_cast<void**>(&hostInterface)) != B_OK) {
-				break;
+				// if an interface isn't explicitly supplied, fall back to
+				// the default local interface.
+				hostInterface = TargetHostInterfaceRoster::Default()
+					->ActiveInterfaceAt(0);
 			}
+
 			BMessenger messenger(fStartTeamWindow);
 			if (!messenger.IsValid()) {
 				fStartTeamWindow = StartTeamWindow::Create(hostInterface);
@@ -473,6 +482,16 @@ Debugger::Quit()
 }
 
 
+void
+Debugger::TeamDebuggerCountChanged(int32 count)
+{
+	if (count == 0) {
+		AutoLocker<Debugger> lock(this);
+		Quit();
+	}
+}
+
+
 status_t
 Debugger::_StartNewTeam(TargetHostInterface* interface, const char* path,
 	const char* args)
@@ -529,7 +548,7 @@ CliDebugger::Run(const Options& options)
 	SignalSet(SIGINT).BlockInCurrentThread();
 
 	// initialize global objects and settings manager
-	status_t error = global_init();
+	status_t error = global_init(this);
 	if (error != B_OK) {
 		fprintf(stderr, "Error: Global initialization failed: %s\n",
 			strerror(error));
@@ -596,7 +615,7 @@ bool
 ReportDebugger::Run(const Options& options)
 {
 	// initialize global objects and settings manager
-	status_t error = global_init();
+	status_t error = global_init(this);
 	if (error != B_OK) {
 		fprintf(stderr, "Error: Global initialization failed: %s\n",
 			strerror(error));

src/apps/debugger/target_host_interface/TargetHostInterfaceRoster.cpp

@@ -23,7 +23,8 @@ TargetHostInterfaceRoster::TargetHostInterfaceRoster()
 	fLock(),
 	fRunningTeamDebuggers(0),
 	fInterfaceInfos(20, false),
-	fActiveInterfaces(20, false)
+	fActiveInterfaces(20, false),
+	fListener(NULL)
 {
 }
 
@@ -41,7 +42,7 @@ TargetHostInterfaceRoster::Default()
 
 
 /*static*/ status_t
-TargetHostInterfaceRoster::CreateDefault()
+TargetHostInterfaceRoster::CreateDefault(Listener* listener)
 {
 	if (sDefaultInstance != NULL)
 		return B_OK;
@@ -52,7 +53,7 @@ TargetHostInterfaceRoster::CreateDefault()
 		return B_NO_MEMORY;
 	ObjectDeleter<TargetHostInterfaceRoster> rosterDeleter(roster);
 
-	status_t error = roster->Init();
+	status_t error = roster->Init(listener);
 	if (error != B_OK)
 		return error;
 
@@ -75,8 +76,9 @@ TargetHostInterfaceRoster::DeleteDefault()
 
 
 status_t
-TargetHostInterfaceRoster::Init()
+TargetHostInterfaceRoster::Init(Listener* listener)
 {
+	fListener = listener;
 	return fLock.InitCheck();
 }
 
@@ -161,6 +163,7 @@ void
 TargetHostInterfaceRoster::TeamDebuggerStarted(TeamDebugger* debugger)
 {
 	fRunningTeamDebuggers++;
+	fListener->TeamDebuggerCountChanged(fRunningTeamDebuggers);
 }
 
 
@@ -168,6 +171,7 @@ void
 TargetHostInterfaceRoster::TeamDebuggerQuit(TeamDebugger* debugger)
 {
 	fRunningTeamDebuggers--;
+	fListener->TeamDebuggerCountChanged(fRunningTeamDebuggers);
 }
 
 
@@ -178,3 +182,17 @@ TargetHostInterfaceRoster::TargetHostInterfaceQuit(
 	AutoLocker<TargetHostInterfaceRoster> locker(this);
 	fActiveInterfaces.RemoveItem(interface);
 }
+
+
+// #pragma mark - TargetHostInterfaceRoster::Listener
+
+
+TargetHostInterfaceRoster::Listener::~Listener()
+{
+}
+
+
+void
+TargetHostInterfaceRoster::Listener::TeamDebuggerCountChanged(int32 count)
+{
+}

src/apps/debugger/target_host_interface/TargetHostInterfaceRoster.h

@@ -19,17 +19,18 @@ class TargetHostInterfaceInfo;
 
 class TargetHostInterfaceRoster : private TargetHostInterface::Listener {
 public:
+	class Listener;
 								TargetHostInterfaceRoster();
 	virtual						~TargetHostInterfaceRoster();
 
 	static	TargetHostInterfaceRoster* Default();
-	static	status_t			CreateDefault();
+	static	status_t			CreateDefault(Listener* listener);
 	static	void				DeleteDefault();
 
 			bool				Lock()		{ return fLock.Lock(); }
 			void				Unlock()	{ fLock.Unlock(); }
 
-			status_t			Init();
+			status_t			Init(Listener* listener);
 			status_t			RegisterInterfaceInfos();
 
 			int32				CountInterfaceInfos() const;
@@ -63,6 +64,15 @@ private:
 			int32				fRunningTeamDebuggers;
 			InfoList			fInterfaceInfos;
 			InterfaceList		fActiveInterfaces;
+			Listener*			fListener;
+};
+
+
+class TargetHostInterfaceRoster::Listener {
+public:
+	virtual						~Listener();
+
+	virtual	void				TeamDebuggerCountChanged(int32 newCount);
 };